diff --git a/tests/docs-examples-test/test_R.sh b/tests/docs-examples-test/test_R.sh
index bc850ecd6eb8b05dd92c14cbe4576b12263a4cdb..707ea027047579ca4530aaccdf9c0f6051a1a1be 100755
--- a/tests/docs-examples-test/test_R.sh
+++ b/tests/docs-examples-test/test_R.sh
@@ -6,7 +6,7 @@ pgrep taosd || taosd >> /dev/null 2>&1 &
 pgrep taosadapter || taosadapter >> /dev/null 2>&1 &
 
 cd ../../docs/examples/R
-wget https://repo1.maven.org/maven2/com/taosdata/jdbc/taos-jdbcdriver/3.2.4/taos-jdbcdriver-3.2.4-dist.jar
+wget -N https://repo1.maven.org/maven2/com/taosdata/jdbc/taos-jdbcdriver/3.2.4/taos-jdbcdriver-3.2.4-dist.jar
 
 jar_path=`find . -name taos-jdbcdriver-*-dist.jar`
 echo jar_path=$jar_path